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This is a simple arithmetic educational game for children. The child who attempts the test can choose three different levels and perform three different arithmetic calculations. The performance can be evaluated by three measurements namely the total of questions attempted, the total of answers that are correct and the total score which is the percentage of right answers.

To generate the questions, we use the syntax Int(Rnd * n), where the Rnd function returns a  random value between 0 and 1, and Int is the function that converts a number into an integer by truncating its decimal decimal part and the resulting integer is the largest integer that is smaller than the number. For examples, let's say Rnd returns a value of 0.23245, then Rnd*10=2.3245, therefore Int(Rnd*10)=Int(2.3245)=2.

The Interface

 

The Code

Dim num1 As Integer
Dim num2 As Integer
Dim intNumber As Integer

Private Sub score()
    intNumber = intNumber + 1
End Sub

Private Sub begin()
    intNumber = 0
    Image1.Visible = False
    Image2.Visible = False
    Label6.Visible = False
    Label5.Visible = False
    Text3.Text = ""
If Option1.Value = "true" Then
    n = 10
ElseIf Option2.Value = "true" Then
    n = 100
ElseIf Option3.Value = "true" Then
    n = 1000
End If

    num1 = Int(Rnd * n)
    num2 = Int(Rnd * n)
    Text1.Text = num1
    Text2.Text = num2
    Text3.SetFocus

End Sub

Private Sub Form_Load()
    Image1.Visible = False
    Image2.Visible = False
    Label6.Visible = False
    Label5.Visible = False
End Sub

Private Sub Start_Click()
    begin
End Sub

Private Sub text3_keyDown(keyCode As Integer, shift As Integer)
If keyCode = vbKeyNext Or keyCode = vbKeyDown Then
    begin
End If
End Sub

Private Sub text3_keypress(keyAscii As Integer)
If (keyAscii = 13) And Val(Text3.Text) = Val(Text1.Text) + Val(Text2.Text) Then

    Image1.Visible = True
    Image2.Visible = False
    Label5.Visible = True
    Label6.Visible = False
    score
    total.Caption = Str$(intNumber)

ElseIf (keyAscii = 13) And Val(Text3.Text) <> Val(Text1.Text) + Val(Text2.Text) Then
    Image1.Visible = False
    Image2.Visible = True
    Label5.Visible = False
    Label6.Visible = True
    Text3.Text = ""
End If

End Sub

Private Sub Next_Click()
    Image1.Visible = False
    Image2.Visible = False
Label6.Visible = False
    Label5.Visible = False
If Option1.Value = "true" Then
    n = 10

ElseIf Option2.Value = "true" Then
    n = 100
ElseIf Option3.Value = "true" Then
    n = 1000
End If
    Text1.Text = ""
    Text2.Text = ""
    Text3.Text = ""
    num1 = Int(Rnd * n)
    num2 = Int(Rnd * n)
    Text1.Text = num1
    Text2.Text = num2
    Text3.SetFocus
End Sub

Private Sub OK_Click()
If Val(Text3.Text) = Val(Text1.Text) + Val(Text2.Text) Then
    Image1.Visible = True
    Image2.Visible = False
    Label5.Visible = True
    Label6.Visible = False
    score
    total.Caption = Str$(intNumber)

Else
    Image1.Visible = False
    Image2.Visible = True
    Label5.Visible = False
    Label6.Visible = True
    Text3.Text = ""
End If
End Sub

Private Sub Option1_Click()
    n = 10
End Sub

Private Sub Option2_Click()
    n = 100
End Sub

Private Sub Option3_Click()
    n = 1000
End Sub